feat(proxy_cli.py): add new 'log_config' cli param (#6352)

* feat(proxy_cli.py): add new 'log_config' cli param

Allows passing logging.conf to uvicorn on startup

* docs(cli.md): add logging conf to uvicorn cli docs

* fix(get_llm_provider_logic.py): fix default api base for litellm_proxy

Fixes https://github.com/BerriAI/litellm/issues/6332

* feat(openai_like/embedding): Add support for jina ai embeddings

Closes https://github.com/BerriAI/litellm/issues/6337

* docs(deploy.md): update entrypoint.sh filepath post-refactor

Fixes outdated docs

* feat(prometheus.py): emit time_to_first_token metric on prometheus

Closes https://github.com/BerriAI/litellm/issues/6334

* fix(prometheus.py): only emit time to first token metric if stream is True

enables more accurate ttft usage

* test: handle vertex api instability

* fix(get_llm_provider_logic.py): fix import

* fix(openai.py): fix deepinfra default api base

* fix(anthropic/transformation.py): remove anthropic beta header (#6361)

litellm/proxy/proxy_cli.py

@@ -153,6 +153,12 @@ def is_port_in_use(port):
     type=bool,
     help="Helps us know if people are using this feature. Turn this off by doing `--telemetry False`",
 )
+@click.option(
+    "--log_config",
+    default=None,
+    type=str,
+    help="Path to the logging configuration file",
+)
 @click.option(
     "--version",
     "-v",
@@ -249,6 +255,7 @@ def run_server(  # noqa: PLR0915
     run_hypercorn,
     ssl_keyfile_path,
     ssl_certfile_path,
+    log_config,
 ):
     args = locals()
     if local:
@@ -690,25 +697,26 @@ def run_server(  # noqa: PLR0915
         # DO NOT DELETE - enables global variables to work across files
         from litellm.proxy.proxy_server import app  # noqa
 
+        uvicorn_args = {
+            "app": app,
+            "host": host,
+            "port": port,
+        }
+        if log_config is not None:
+            print(f"Using log_config: {log_config}")  # noqa
+            uvicorn_args["log_config"] = log_config
+        elif litellm.json_logs:
+            print("Using json logs. Setting log_config to None.")  # noqa
+            uvicorn_args["log_config"] = None
+
         if run_gunicorn is False and run_hypercorn is False:
             if ssl_certfile_path is not None and ssl_keyfile_path is not None:
                 print(  # noqa
                     f"\033[1;32mLiteLLM Proxy: Using SSL with certfile: {ssl_certfile_path} and keyfile: {ssl_keyfile_path}\033[0m\n"  # noqa
                 )
-                uvicorn.run(
-                    app,
-                    host=host,
-                    port=port,
-                    ssl_keyfile=ssl_keyfile_path,
-                    ssl_certfile=ssl_certfile_path,
-                )  # run uvicorn
-            else:
-                if litellm.json_logs:
-                    uvicorn.run(
-                        app, host=host, port=port, log_config=None
-                    )  # run uvicorn w/ json
-                else:
-                    uvicorn.run(app, host=host, port=port)  # run uvicorn
+                uvicorn_args["ssl_keyfile"] = ssl_keyfile_path
+                uvicorn_args["ssl_certfile"] = ssl_certfile_path
+            uvicorn.run(**uvicorn_args)
         elif run_gunicorn is True:
             # Gunicorn Application Class
             class StandaloneApplication(gunicorn.app.base.BaseApplication):